How to Use the Lysine-Arginine Ratio
The ratio shown in the database is calculated as lysine ÷ arginine per 100g of food. Higher is better for people with herpes. Here is a quick guide to interpreting the numbers:
- Ratio > 2.0: Excellent — strongly favours lysine. Examples: most fish, poultry, and dairy.
- Ratio 1.0–2.0: Good — more lysine than arginine. Safe to eat freely.
- Ratio 0.5–1.0: Moderate — roughly balanced. Eat in moderation alongside high-lysine foods.
- Ratio < 0.5: Unfavourable — significantly more arginine than lysine. Limit these foods, especially during or before an outbreak.
All values in the database are per 100g of food unless stated otherwise. Portion size matters: a small amount of a high-arginine food may still be fine in the context of an otherwise lysine-rich meal. Focus on your overall daily ratio rather than avoiding individual foods entirely.
Frequently Asked Questions
Which foods have the highest lysine-to-arginine ratio?
Fish consistently top the database — particularly flounder, cod, halibut, and sole — with ratios of 3.0 or higher. Poultry (chicken and turkey breast) and most dairy products (cottage cheese, ricotta, Greek yogurt) also score very favourably. Among plant foods, mangoes and papayas have unusually high lysine-to-arginine ratios compared to most fruits.
Which common foods are highest in arginine and worst for herpes?
Nuts are the biggest concern — particularly peanuts, almonds, walnuts, and Brazil nuts, which have arginine-to-lysine ratios of 3:1 or higher. Seeds (sesame, sunflower, pumpkin) are similarly high in arginine. Chocolate and cocoa are notorious for their high arginine content. Among grains, oats and wheat germ have higher arginine relative to refined grains. These foods are not forbidden, but they are best eaten alongside high-lysine proteins to offset the arginine load.
How much lysine per day is recommended for herpes management?
Clinical studies on lysine for herpes have used doses ranging from 1,000mg to 3,000mg daily. For maintenance (outbreak prevention), 1,000–1,500mg per day is the most commonly studied dose. For acute outbreak treatment, 3,000mg per day for 5–7 days is sometimes used. These amounts are achievable through diet alone only if you are eating substantial portions of lysine-rich proteins at multiple meals — supplementation fills the gap for most people. Always discuss supplementation doses with your healthcare provider, as high-dose lysine can cause gastrointestinal side effects.
Can I use this database to plan a herpes-friendly meal plan?
Yes. Search for the protein sources you eat most regularly and confirm they have ratios above 1.0. Then check snack foods, nuts, and any protein supplements you use — these are the most likely sources of hidden arginine in a typical diet. Building meals around fish, poultry, eggs, and dairy as your primary proteins, with vegetables and fruits as sides, will naturally produce a lysine-favourable diet for most people. Our guide to the best foods for cold sores provides a practical meal planning framework using this data.